Same docs, two versions

AIKloop Payments is a fictional API. Its docs exist in two versions. Both look fine to a human. The difference is what an AI agent can get out of them.

20× cheaper, every answer right

Same prompts. The stale docs needed the expensive model, and it still got one answer wrong.

Before Stale docs $1.47 Claude Opus 5.5 · expensive model · 1 answer wrong The API reference shows v3, but the docs still use the old endpoints and nothing says they're out of date. The reference is drawn by JavaScript, and there's no Markdown or llms.txt. Before docs ↗ After After a Knowledge Loop Assessment $0.072 Claude Haiku 5.5 · cheaper model · all answers correct The docs are updated for v3, with a changelog. Every page has a Markdown version, the API reference is generated when the site is built, and llms.txt tells agents which version is current. After docs ↗

See what an AI agent gets from each version → See the docs tests, and what happens when the API changes →

Both versions use the same layout and table of contents, and both API references come from the same API spec. The difference is the content and what an agent can read. Domains end in .example, a reserved ending that can never point to a real site.